Year	Percent
1998	6.34551
1999	7.80128
2000	1.01038
2001	4.24366
2002	-0.93946
2003	2.52035
2004	3.23933
2005	1.07143
2006	2.54396
2007	5.83296
2008	0.39758
2009	-13.88021
2010	-5.84155
2011	-10.57268
2012	-8.73625
2013	-4.20036
2014	-1.95655
2015	-0.43832
2016	0.22725
2017	0.63893